EP3395114B1 - Procédure d'accès à un canal et approvisionnement qos pour un laa de liaison montante - Google Patents

Procédure d'accès à un canal et approvisionnement qos pour un laa de liaison montante Download PDF

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Publication number
EP3395114B1
EP3395114B1 EP17752684.5A EP17752684A EP3395114B1 EP 3395114 B1 EP3395114 B1 EP 3395114B1 EP 17752684 A EP17752684 A EP 17752684A EP 3395114 B1 EP3395114 B1 EP 3395114B1
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Prior art keywords
capc
uplink
data transmission
lbt
channel
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German (de)
English (en)
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EP3395114A4 (fr
EP3395114A1 (fr
Inventor
Weidong Yang
Bo-Si CHEN
Chien-Chang LI
Yih-Shen Chen
Pavan Santhana Krishna Nuggehalli
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HFI Innovation Inc
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HFI Innovation Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/04—Scheduled or contention-free access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal

Definitions

  • the disclosed embodiments relate generally towireless network communications, and, more particularly, tochannel access procedure and QoS provisioning inuplink licensed assisted access (LAA)wireless communications systems.
  • LAA licensed assisted access
  • eNBs base stations
  • eNBs under one operator can exchange channel state information and scheduling information.
  • radio resource access is typically controlled by eNB in an LTE system.
  • CoMP Coordinated Multipoint Operation
  • eCoMP centralized or distributed scheduling can be used to coordinate the transmissions from eNBs with a direct goal to achieve either higher SINRs or interference mitigation.
  • a salient point about (e)CoMP is identified as information exchange is through a network link which is either proprietary or standard based (e.g.
  • interference handling is a central issue in wireless communications and the sole ownership of licensed spectrum has enabled information exchange among eNBs under one operator to achieve effective interference handling.
  • LTE Long Term Evolution
  • IOT Internet of Things
  • UE new user equipment
  • LAA Licensed Assisted Access
  • an established communication protocol such as LTE can be used over the licensed spectrum to provide a fist communication link, and LTE can also be used over the unlicensed spectrum to provide a second communication link.
  • enhanced LAA allows uplink streams to take advantage of the unlicensed band as well.
  • the unlicensed band could be ISM band (Industrial Scientific Medical Band) at 2.4GHz or 5GHz, or it could be CBRS band (Citizens Broadband Radio Service band) at 3.5GHz as long as no spectrum auction procedure takes place.
  • Listen-before-talk (LBT)schemes are discussed for solving the issue caused from the coexistence between WiFi and Licensed Assisted Access(LAA) and between LAA and LAA.
  • LBT Listen-before-talk
  • the dynamic spectrum sharing mechanism LBT need to be supported for both downlink LAA and uplink LAA based on regulation rules in each country.
  • Though LTE applies request-and-grant-based uplink scheduling principle, UL LBT is still needed.
  • PDCCH grant command from eNB
  • PUSCH uplink transmission by UE.
  • UE has to perform UL LBT to confirm channel ownership.
  • uplink LBT scheme should perform in a proper way to reflect service prioritization.
  • a method for using channel sensing for uplink transmission in a radio communications system is provided.
  • the same uplink time-frequency resource is scheduled to at least two terminal devices and sensing periods of unequal lengths are allocated to the terminal devices.
  • a sensing period defines a duration for which a terminal device senses the uplink time-frequency resource for a conflicting transmission before transmitting in the uplink time-frequency resource.
  • the same uplink reference signal sequence may be allocated to the terminal devices.
  • the lengths of the sensing periods may be multiples of an uplink symbol duration.
  • a shorter sensing period is allocated to a terminal having higher transmission priority and a longer sensing period is allocated to a terminal having lower transmission priority.
  • a sensing period may be allocated dynamically together with a scheduling message delivering to the terminal device an indication of the scheduled uplink time-frequency resource. Sensing periods may be allocated only to terminal devices operating on an unlicensed frequency band.
  • a method of channel access procedure and QoS provisioning is proposed.
  • uplink listen-before-talk (LBT) scheme should perform in a proper way to reflect service prioritization.
  • the base station first determines the Channel Access Priority (CAP) for uplink LBT, and then signals such CAP to the UE via PDCCH.
  • CAP Channel Access Priority
  • the UE Upon receiving the CAP, the UE performs LBT procedure with corresponding CAP before uplink transmission.
  • the CAP can be determined based on QoS class identifier (QCI) of the radio bearer or based on the MAC layer logical channel prioritization (LCP).
  • QCI QoS class identifier
  • LCP MAC layer logical channel prioritization
  • FIG. 1 illustrates an exemplary Licensed Assisted Access (LAA) wireless communications system 100 that adopts listen before talk (LBT) channel access mechanism with QoS provisioning in accordance with embodiments of the current invention.
  • WLAN communications system 100 includes one or more wireless communication networks, and each of the wireless communication networks has base infrastructure units, such as 102 and 104.
  • the base infrastructure units may also be referred to as an access point, an access terminal, a base station, eNB, or by other terminology used in the art.
  • Each of the base stations 102 and 104 serves a geographic area. The geographic area served by wireless communications stations 102 and 104 overlaps in this example.
  • Base station 102 is a licensed base station that communicates with UE 101 via a licensed frequency band. In one example, base station 102 communicates with UE 101 via Long-Term Evolution (LTE) wireless communication. Base station 102 provides wireless communication to multiple UEs within primary cell 103. Base station 104 is an unlicensed base station that communicates with UE 101 via an unlicensed frequency band. In one example, base station 104 communicates with UE 101 via LTE wireless communication. Base station 104 can communicate with multiple UEs with a secondary cell 105. Secondary cell 105 is also referred to as a "small cell”. Note that, Figure 1 is an illustrative plot. The base station 102 and base station 104 can be co-located geographically.
  • LTE Long-Term Evolution
  • LAA Licensed Assisted Access
  • a LAA network utilizes unlicensed frequency bands in addition to licensed frequency bands contemporaneously, thereby provided additional available bandwidth to the UEs in the wireless system.
  • UE 101 can benefit from simultaneous use of the licensed frequency band and the unlicensed frequency band in a LAA network.
  • the LAA network not only provides additional bandwidth for greater overall data communication, but also provide consistent data connectivity due to the presence of two separate data links. Having multiple data links available increases the probability that the UE will be able to achieve proper data communication with at least one base station at any given moment. While utilization of the unlicensed spectrum provides more available bandwidth, the use of the unlicensed spectrum faces practical problems that need to be addressed.
  • LAA listen-before-talk
  • eNB 104 performs LBT to contend channel ownership and initiates data transmission.
  • eNB 104 and UE 101 perform LBT procedure, eNB 104 performs LBT for Physical Downlink Control Channel (PDCCH) transmission, and UE 101 performs LBT for Physical Uplink Shared Channel (PUSCH) transmission.
  • PDCH Physical Downlink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • uplink LBT scheme should perform in a proper way to reflect service prioritization.
  • the base station first determines the Channel Access Priority (CAP) for uplink LBT, and then signals such CAP to the UE via PDCCH.
  • CAP Channel Access Priority
  • the UE Upon receiving the CAP, the UE performs LBT procedure with corresponding CAP before uplink transmission.
  • FIG. 2 is a simplified block diagram of wireless devices 201 and 211 in accordance with a novel aspect.
  • wireless device 201 e.g., a transmitting device
  • antennae 207 and 208 transmit and receive radio signal.
  • RF transceiver module 206 coupled with the antennae, receives RF signals from the antennae, converts them to baseband signals and sends them to processor 203.
  • RF transceiver 206 also converts received baseband signals from the processor, converts them to RF signals, and sends out to antennae 207 and 208.
  • Processor 203 processes the received baseband signals and invokes different functional modules and circuits to perform features inwireless device 201.
  • Memory 202 stores program instructions and data 210to control the operations of device 201.
  • antennae217 and 218 transmit and receive RF signals.
  • RF transceiver module 216 coupled with the antennae, receives RF signals from the antennae, converts them to baseband signals and sends them to processor213.
  • the RF transceiver 216 also converts received baseband signals from the processor, converts them to RF signals, and sends out to antennae 217 and 218.
  • Processor 213 processes the received baseband signals and invokes different functional modules and circuits to perform features in wireless device 211.
  • Memory 212 stores program instructions and data 220to control the operations of the wireless device 211.
  • wireless devices 201 and211 also include several functional modules and circuits that can be implemented and configured to perform embodiments of the present invention.
  • wireless device 201 is a base stationthat includes a radio bearer handling circuit 205, a scheduler 204, a channel access circuit 209, and a CAPC mapper 221.
  • Wireless device 211 is a user equipment that includes a radio bearer handling circuit 215, a feedback circuit 214, a channel access circuit 219, and a CAPC configuration circuit 231.
  • the different functional modules and circuits can be implemented and configured by software, firmware, hardware, and any combination thereof.
  • the function modules and circuits when executed by the processors 203 and 213 (e.g., via executing program codes 210 and 220), allow wireless device 201 and wireless device 211 to perform embodiments of the present invention.
  • the base station establishes a data radio bearer with the UE via radio bearer handing circuit 205, schedules downlink and uplink transmission for UEs via scheduler 204, performs downlink LBT procedure via channel access circuit 209, and determines CAPC for the UE via CAPC mapper 221.
  • the user equipment establishes a data radio bearer with the base station via radio bearer handing circuit 215, provides feedback information to the base station via feedback circuit 214, performs uplink LBT procedure via channel access circuit 219, and obtains CAPC info via CAPC configuration circuit 231.
  • a transmitter is allowed to transmit radio signals onto the shared wireless medium depending on clear channel assessment (CCA) sensing and a deferral or backoff procedure for channel access contention as long as the CCA indicates the channel is idle.
  • CCA clear channel assessment
  • the LBT procedure allows the transmitter to gain access to the shared wireless medium, e.g., to obtain a transmitting opportunity (TXOP) for transmitting radio signals onto the shared wireless medium.
  • TXOP transmitting opportunity
  • the basic assumption of LBT is that a packet collision can be detected if a device transmits signal under the channel busy condition when the received signal level is higher than a CCA level, e.g., an energy detection (ED) threshold or a preamble detection (PD) threshold.
  • ED energy detection
  • PD preamble detection
  • the transmitting entity draws a random number N within a contention window (CW).
  • the size of the contention window is specified by the minimum and maximum value of N.
  • the transmitting entity can vary the size of the contention window when drawing the random number N.
  • the random number N is used in the LBT procedure to determine the duration of time that the channel is sensed to be idle before the transmitting entity transmits on the channel.
  • a Category 4 LBT involves both an initial CCA and an extended CCA (eCCA) channel access procedure.
  • LBT is a form of differentiated QoS.
  • traffic can be classified into four access categories (AC): AC_VI (for video), AC_VO (for voice), AC_BE (for best effort), and AC_BK (for background).
  • AC access category
  • Each device is expected to access the channel based on the AC-specific LBT parameters to which the traffic belongs.
  • the four access categories are also referred to as channel access priority class (CAPC) for the purpose of uplink LBT.
  • CAC channel access priority class
  • a maximum channel occupancy time (MCOT) including DL transmission from one eNB and UL transmission to the same eNB is introduced.
  • a transmission sequence is defined as a number of subframes including possible partial subframes for DL and/or UL within a MCOT.
  • the transmission in the first subframe among the transmission sequence is conducted after a Category 4 LBT.
  • the node performing the Category 4 LBT can be either an eNB or a UE.
  • a sequence of transmission including DL and/or UL can follow the transmission on the first subframe.
  • the transmission sequence within the MCOT can be initiated by either a DL transmission or an UL transmission.
  • the duration of a transmission sequence is called transmission duration.
  • Figure 3 illustrates one embodiment of channel access priority class (CAPC) for DL/UL LBT procedure.
  • CAC channel access priority class
  • each priority class is associated with a set of LBT parameters: m p (deferred duration in LBT), CW MIN (minimum contention window), CW MAX (maximum contention window), T MCOT (MCOT) and allowed CW sizes.
  • the UE For uplink transmission over PUSCH, the UE constructs a MAC PDU based on the uplink grant notification from lower layers (e.g., PDCCH) which is to be transmitted over an unlicensed carrier.
  • the MAC PDU has data belong to DRBs and logical channels.
  • the UE performs LBT procedure using LBT parameters associated with a corresponding CAPC.
  • the CAPC is determined by the eNB and signaled to the UE via PDCCH associated with the uplink grant.
  • FIG. 4 illustrates one embodiment of determining and configuring CAPC for uplink LBT procedure in accordance with one novel aspect.
  • a base station eNB 401 and a user equipment UE 402 establishes a dedicated connection with each other.
  • the dedicated connection is a dedicated radio bearer (DRB) associated a quality class identifier (QCI).
  • DRB dedicated radio bearer
  • QCI quality class identifier
  • Each DRB has a one-to-one mapping to a logical channel belonging to a logical channel group (LCG).
  • eNB 401 determines the CAPC for UE 402 for LBT parameters to be applied in the subsequent uplink transmission.
  • the CAPC can be determined based on the QCI of the DRB or based on the MAC layer logical channel prioritization (LCP).
  • LCP MAC layer logical channel prioritization
  • eNB 401 sends uplink scheduling information to UE 402 over a PDCCH.
  • the PDCCH also carries the CAPC information determined by the base station.
  • eNB 401 configures the CAPC as part of the logic channel configuration that is sent to UE 402 via radio resource control (RRC) signaling.
  • RRC radio resource control
  • UE 402 receives the uplink scheduling information including the CAPC and starts to initiate uplink transmission by performing an uplink LBT procedure.
  • the LBT procedure is applied with a set of LBT parameters that is associated with the received CAPC.
  • UE 402 transmits uplink data over PUSCH.
  • FIG. 5 illustrates a first example of QoS provisioning in LTE based on QoS class identifier (QCI).
  • each data radio bearer DRB
  • EPS Evolved Packet System
  • QCI Quality Class Identifier
  • IMS signaling and VoLTE flow are assigned with different QCI.
  • QCI value is provided during bearer setup in non-access stratum (NAS) messaging.
  • NAS non-access stratum
  • it is also possible to modify the QCI value associated with an EPS bearer e.g., using the NAS layer EPS modification process).
  • FIG. 6 illustrates a second example of QoS provisioning in LTE based on Logic Channel Prioritization (LCP).
  • LCP is used in media access control (MAC) layer for QoS differentiation.
  • MAC media access control
  • each DRB has a one-to-one mapping with a logical channel.
  • the radio resource control (RRC) layer controls the scheduling of the uplink data by configuring the following parameters for each logical channel: Priority, Prioritized Bit Rate (PBR), and Bucket Size Duration (BSD).
  • PBR Prioritized Bit Rate
  • BSD Bucket Size Duration
  • UE applies the logical channel prioritization procedure to construct a MAC PDU or Transport Block (TB) based on these configured values.
  • the resulting MAC PDU can contain data from different logical channels or DRBs.
  • FIG. 7 illustrates a first embodiment of CAPC determination based on QCI.
  • CAPC channel access priority classes
  • Similar priority classes in the uplink are defined with a mapping between CAPC and QCI, as depicted in Table 700 of Figure 7 .
  • Table 700 of Figure 7 can be configured in the 3GPP specification, or be signaled in broadcast or by dedicated RRC signaling, or by NAS messaging.
  • the CAPC of an uplink MAC PDU is then determined by the QCI value of the corresponding content.
  • FIG. 8 illustrates a second embodiment of CAPC determination based on LCP.
  • Each logical channel for each DRB identified by a logical channel ID (LCID)
  • LCG logical channel group
  • BSR buffer status report
  • a UE UE to eNB
  • the amount of data for one LCG is indicated.
  • a long BSR the amount of data for each LCG is indicated.
  • the eNB is aware of the buffered data amount at each LCG at a UE.
  • the eNB can choose the LBT parameter set that will be used by the UE according to the intended LCG index.
  • LCP logical channel prioritization
  • CAPC logical channel prioritization
  • PUSCH transmission can occupy a single subframe or occupy multiple subframes.
  • eNB performs UL grant subframe by subframe.
  • LAA consecutive multiple subframe grant is introduced.
  • LBT is performed only the first subframe, the UE has to determine both CAPC and duration of transmission, which may be linked due to MCOT restrictions.
  • a first LCP (logic channel prioritization)mechanism #1 the UE uses CAPC (C) and duration (T) as input, assuming each logical channel is associated with a CAPC value that is mapped from QCI, LCP, or from direct configuration.
  • the UE forms MAC PDU according to the following rules: 1) fill the grant as much as possible with data from logical channels configured with CAPC value lower (i.e., higher QoS) than that indicated by the eNB; 2) if the grant is not exhausted, use data from lower QoS logical channels in order of priority.
  • the UE uses duration (T) as input, and forms MAC PDU for grant corresponding to T rather than one subframe, assuming CAPC is also determined from QCI, LCP, or from direct configuration.
  • Figure 9 illustrates one embodiment of multiple subframe PUSCH transmission and QoS provisioning in accordance with one novel aspect.
  • an eNB can indicate CAPC only, duration of transmission only, both CAPC and duration, or neither CAPC nor duration (just when the UL can start).
  • CAPC duration can be limited by MCOT for the value of CAPC or data available.
  • Duration is indicated, CAPC may be implicitly indicated, or worst CAPC assumed, or based on MAC contents.
  • the rules defining MCOT per CAPC can be either defined in LTE specification or signaled via RRC.
  • a base station eNB 901 and a user equipment UE 902 establishes a dedicated connection with each other.
  • the dedicated connection is a dedicated radio bearer (DRB) associated a quality class identifier (QCI).
  • DRB has a one-to-one mapping to a logical channel belonging to a logical channel group (LCG).
  • eNB 901 determines the CAPC for UE 902 for LBT parameters to be applied in the subsequent uplink transmission.
  • the CAPC can be determined based on the QCI of the DRB or based on the MAC layer logical channel prioritization (LCP).
  • LCP MAC layer logical channel prioritization
  • eNB 901 sends uplink scheduling information to UE 902 over a PDCCH.
  • the PDCCH may carry the CAPC information and/or the duration information.
  • the base station configures the CAPC as part of logic channel configuration that is sent to the UE via radio resource control (RRC) signaling (step 932).
  • RRC
  • UE 902 Upon receiving the uplink scheduling, UE 902 needs to determine the LBT parameters accordingly.
  • the UE receives CAPC as well as duration.
  • the UE can use LCP mechanism #1 to determine MAC PDU. If MAC PDU only contains data of lower QoS than indicated CAPC, then the UE uses the CAPC value corresponding to the most QoS sensitive data present.
  • the UE only receives CAPC without duration, which can be assumed to be equal to MCOT for indicated CAPC.
  • UE can use LCP mechanism #2 to determine MAC PDU.
  • the uplink scheduling indicates duration only. The UE can determine CAPC to be the best CAPC value for which MCOT is greater than or equal to the indicated duration T.
  • the UE then can use LCP mechanism #1 or #2 to determine MAC PDU.
  • the eNB indicates neither CAPC nor duration.
  • the UE can determine CAPC to be the CAPC of the most QoS sensitive logical channel with data available for transmission, and choose duration T to be the MCOT corresponding to the CAPC.
  • the UE then can use LCP mechanism #1 or #2 to determine MAC PDU.
  • UE 402 starts to initiate uplink transmission by performing an uplink LBT procedure.
  • the LBT procedure is applied with a set of LBT parameters that is associated with the CAPC.
  • UE 902 transmits uplink data in one or multiple subframes over PUSCH.
  • FIG. 10 is a flow chart of a method of channel access procedure and QoS provisioning from base station perspective in accordance with a novel aspect.
  • a base station establishes a data radio bearer (DRB) with a user equipment (UE) in a wireless communications network.
  • the DRB is associated with an Evolved Packet System (EPS) bearer and a logical channel.
  • the base station schedules an uplink data transmission for the UE, and determining a channel access priority class (CAPC) for the uplink data transmission from the UE.
  • the base station transmits uplink scheduling information over a physical downlink control channel (PDCCH) to the UE.
  • the uplink scheduling information comprises the determined CAPC.
  • the base station receives the uplink data transmission from the UE over an unlicensed frequency band.
  • FIG 11 is a flow chart of a method of channel access procedure and QoS provisioning from UE perspective in accordance with a novel aspect.
  • a user equipment UE establishes a data radio bearer (DRB) with a base station in a wireless communications network.
  • the DRB is associated with an Evolved Packet System (EPS) bearer and a logical channel.
  • the UE receives uplink scheduling information from the base station over a physical downlink control channel (PDCCH).
  • the uplink scheduling information comprises a channel access priority class (CAPC) for uplink data transmission from the UE.
  • the UE performs a listen before talk (LBT) procedure applied with a set of LBT parameters associated with the CAPC.
  • the UE transmits the uplink data transmission over an unlicensed frequency band upon successful completion of the LBT procedure.
  • LBT listen before talk

Claims (8)

  1. Procédé comprenant :
    l'établissement d'un support radio de données, DRB, par une station de base (201) avec un équipement utilisateur, UE (211), dans un réseau de communications sans fil (200), dans lequel le DRB est associé à un support de système de paquets évolué, EPS, et à un canal logique, et le support EPS a un profil QoS qui inclut un identificateur de classe de qualité, QCI ;
    la planification, par la station de base, d'une transmission de données de liaison montante pour l'UE (211), et la détermination d'une classe de priorité d'accès au canal, CAPC, pour une procédure d'écoute avant de parler, LBT, de liaison montante, UL, pour obtenir un accès en liaison montante pour la transmission de données de liaison montante depuis l'UE (211) ;
    la transmission, par la station de base, d'informations de planification de liaison montante sur un canal de commande de liaison descendante physique, PDCCH, à l'UE (211), où les informations de planification de liaison montante comprennent la CAPC déterminée ; et
    la réception, par la station de base, de la transmission de données de liaison montante depuis l'UE (211) sur une bande de fréquences sans licence en réponse à l'achèvement réussi de la procédure LBT UL ;
    dans lequel le procédé est caractérisé en ce que :
    la transmission de données de liaison montante occupe plusieurs sous-trames consécutives et la procédure LBT UL n'est réalisée que dans la première sous-trame ; et
    le canal logique est associé à la CAPC qui est mappée à partir du QCI ou d'une hiérarchisation de canaux logiques, LCP ; et la transmission de données de liaison montante comprend une unité de données de protocole, PDU, de commande d'accès au support, MAC, qui est remplie de données provenant de canaux logiques configurés avec des priorités inférieures à une priorité associée à la CAPC ; et en réponse au fait qu'une durée de la transmission de données de liaison montante n'est pas épuisée par la PDU MAC, la PDU MAC est en outre remplie de données provenant de canaux logiques configurés avec des priorités supérieures ou égales à la priorité associée à la CAPC.
  2. Procédé de la revendication 1, dans lequel la station de base (201) configure la CAPC en tant que partie d'une configuration de canal logique qui est envoyée à l'UE (211) via une signalisation de commande de ressource radio, RRC.
  3. Procédé de la revendication 1, dans lequel les informations de planification de liaison montante comprennent à la fois la CAPC et la durée de la transmission de données de liaison montante.
  4. Procédé comprenant :
    l'établissement d'un support radio de données, DBR, par un équipement utilisateur, UE (211), avec une station de base (201) dans un réseau de communications sans fil (200), où le DRB est associé à un support de système de paquets évolué, EPS, et à un canal logique, et le support EPS a un profil QoS qui inclut un identificateur de classe de qualité, QCI ;
    la réception, par l'UE, d'informations de planification de liaison montante de la station de base (201) sur un canal de commande de liaison descendante physique, PDCCH, où les informations de planification de liaison montante comprennent une classe de priorité d'accès au canal, CAPC, pour une procédure d'écoute avant de parler, LBT, de liaison montante, UL, pour obtenir un accès en liaison montante pour une transmission de données de liaison montante depuis l'UE (211) ;
    la réalisation, par l'UE, de la procédure LBT UL appliquée avec un ensemble de paramètres LBT associés à la CAPC ; et
    la transmission, par l'UE, de la transmission de données de liaison montante sur une bande de fréquences sans licence lors de l'achèvement réussi de la procédure LBT UL ;
    dans lequel le procédé est caractérisé en ce que :
    la transmission de données de liaison montante occupe plusieurs sous-trames consécutives et la procédure LBT UL n'est réalisée que dans la première sous-trame ; et
    le canal logique est associé à la CAPC qui est mappée à partir du QCI ou d'une hiérarchisation de canaux logiques, LCP ; et la transmission de données de liaison montante comprend une unité de données de protocole, PDU, de commande d'accès au support, MAC, qui est remplie de données provenant de canaux logiques configurés avec des priorités inférieures à une priorité associée à la CAPC ; et en réponse au fait qu'une durée de transmission de données de liaison montante n'est pas épuisée par la PDU MAC, la PDU MAC est en outre remplie de données provenant de canaux logiques configurés avec des priorités supérieures ou égales à la priorité associée à la CAPC.
  5. Équipement utilisateur, UE (211), comprenant :
    un circuit de gestion de support radio (215) adapté pour établir un support radio de données, DRB, avec une station de base (201) dans un réseau de communications sans fil (200), dans lequel le DRB est associé à un support de système de paquets évolué, EPS, et à un canal logique, et le support EPS a un profil QoS qui inclut un identificateur de classe de qualité, QCI ;
    un récepteur radiofréquence, RF, (216) adapté pour recevoir des informations de planification de liaison montante de la station de base (201) sur un canal de commande de liaison descendante physique, PDCCH, où les informations de planification de liaison montante comprennent une classe de priorité d'accès au canal, CAPC, pour une procédure d'écoute avant de parler, LBT, de liaison montante, UL, pour obtenir un accès en liaison montante pour une transmission de données de liaison montante depuis l'UE (211) ; et
    un circuit d'accès au canal (219) adapté pour réaliser la procédure LBT UL appliquée avec un ensemble de paramètres LBT associés à la CAPC ; et
    un émetteur RF (216) adapté pour transmettre la transmission de données de liaison montante sur une bande de fréquences sans licence lors de l'achèvement réussi de la procédure LBT UL ;
    dans lequel l'UE (211) est caractérisé en ce que :
    la transmission de données de liaison montante occupe plusieurs sous-trames consécutives et la procédure LBT UL n'est réalisée que dans la première sous-trame ; et
    le canal logique est associé à la CAPC qui est mappée à partir du QCI ou d'une hiérarchisation de canaux logiques, LCP ; et la transmission de données de liaison montante comprend une unité de données de protocole, PDU, de commande d'accès au support, MAC, qui est remplie de données provenant de canaux logiques configurés avec des CAPC inférieures à la CAPC ; et en réponse au fait qu'une durée de la transmission de données de liaison montante n'est pas épuisée par la PDU MAC, la PDU MAC est en outre remplie de données provenant de canaux logiques configurés avec la CAPC ou des CAPC supérieures.
  6. Procédé de la revendication 4 ou UE de la revendication 5, dans lequel l'UE (211) reçoit la CAPC en tant que partie d'une configuration de canal logique via une signalisation de commande de ressource radio, RRC.
  7. Procédé de la revendication 4 ou UE de la revendication 5, dans lequel la procédure LBT UL implique l'envoi de canal libre, CCA, dans lequel l'ensemble de paramètres LBT comprend une période de report CCA et une taille de fenêtre de contention CCA.
  8. Procédé de la revendication 4 ou UE de la revendication 5, dans lequel l'UE détermine que la durée de la transmission de données de liaison montante est un temps d'occupation de canal maximal, MCOP.
EP17752684.5A 2016-02-16 2017-02-16 Procédure d'accès à un canal et approvisionnement qos pour un laa de liaison montante Active EP3395114B1 (fr)

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US201662315697P 2016-03-31 2016-03-31
US15/433,492 US10045376B2 (en) 2016-02-16 2017-02-15 Channel access procedure and QoS provisioning for uplink LAA
PCT/CN2017/073795 WO2017140252A1 (fr) 2016-02-16 2017-02-16 Procédure d'accès à un canal et approvisionnement qos pour un laa de liaison montante

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EP3395114A4 (fr) 2019-02-20
EP3395114A1 (fr) 2018-10-31
EP3395117B1 (fr) 2020-09-09
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TWI642320B (zh) 2018-11-21
CN107615870B (zh) 2021-08-27
CN107852746A (zh) 2018-03-27
WO2017140249A1 (fr) 2017-08-24
CN113613338B (zh) 2023-10-31
TWI646856B (zh) 2019-01-01
CN113613338A (zh) 2021-11-05
TW201731328A (zh) 2017-09-01
BR112018015621A2 (pt) 2018-12-26
US10045376B2 (en) 2018-08-07
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